Circular cylinder air filter
A circular cylinder air filter includes an inner cylindrical frame, an outer cylindrical frame, a circular disc, a bonding base and a non-woven fabric cover. The outer cylindrical frame is coaxially arranged around the inner cylindrical frame. The circular disc is fastened to a first end of the inner cylindrical frame and the outer cylindrical frame. The bonding base is fastened to an opposite second end of the inner cylindrical frame and the outer cylindrical frame. A first opening of the bonding base communicates with a first hollow region between the inner cylindrical frame and the outer cylindrical frame. A second opening of the bonding base communicates with a second hollow region within the inner cylindrical frame. The air filter medium is filled into the first hollow region through the first opening. The fabric cover encloses the outer cylindrical frame, circular disc and bonding base to expose the second opening.
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1. Field of Invention
The present invention relates to an air filter device.
2. Description of Related Art
Conventional circular cylinder air filter contains air filter medium. After the air filter medium and the airflows to be filtered produce a chemical reaction and lose of filtering utility, the replaced cylindrical frame can only be disposed aside and can not be re-used, obviously not comply with the environmental protection concept.
SUMMARYIt is therefore an objective of the present invention to provide a circular cylinder air filter with air filter medium replaceable function.
In accordance with the foregoing and other objectives of the present invention, circular cylinder air filter includes a hollow inner cylindrical frame, a hollow outer cylindrical frame, a circular disc, a bonding base and a non-woven fabric cover. The inner cylindrical frame has a plurality of first filter webs. The outer cylindrical frame is coaxially arranged around the inner cylindrical frame and has a plurality of second filter webs. The circular disc is fastened to a first end of the inner cylindrical frame and the outer cylindrical frame. The bonding base is fastened to an opposite second end of the inner cylindrical frame and the outer cylindrical frame. The bonding base has a first opening and a second opening. The first opening communicates with a first hollow region between the inner cylindrical frame and the outer cylindrical frame. The second opening communicates with a second hollow region within the inner cylindrical frame. A plurality of air filter medium is filled into the first hollow region through the first opening, wherein the air filter medium has a dimension that is greater than any filter hole of the first filter webs and the second filter webs. The non-woven fabric cover encloses the outer cylindrical frame, the circular disc and the bonding base to expose the second opening, and airflows to be filtered is introduced into the second hollow region through the second opening, filtered via the air filter medium within the first hollow region and finally filtered via the non-woven fabric cover.
According to another embodiment disclosed herein, the non-woven fabric cover is a fabric cover made from polypropylene fiber.
According to another embodiment disclosed herein, the non-woven fabric cover is a fabric cover made from polyethylene fiber.
According to another embodiment disclosed herein, the first hollow region has a thickness ranging from about 10 mm to about 25 mm.
According to another embodiment disclosed herein, the first hollow region has a thickness of 22 mm.
According to another embodiment disclosed herein, the first hollow region has a thickness of 12 mm.
According to another embodiment disclosed herein, the air filter medium has a concentration of greater than 12 percent sodium permanganate by weight.
According to another embodiment disclosed herein, the bonding base is a disc-shaped member, which has three positioning pins disposed at a rim thereof.
According to another embodiment disclosed herein, the three positioning pins are symmetrical as to a center of the bonding base.
According to another embodiment disclosed herein, any adjacent two of the three positioning pins and the center of the bonding base forms two virtual lines, which has an included angle of 120 degrees therebetween.
Thus, the circular cylinder air filter disclosed herein has the filter medium hole designed on the bonding base. When the bonding base is fastened to the back plane, the filter medium hole is blocked by the back plane such that the plastic cover sealing the filter medium hole would not be pushed out due to the high pressure. In addition, a distance between the inner and outer cylindrical frame, i.e., a thickness of the first hollow region, is reduced to effectively reduce the pressure loss. The circular cylinder air filter can also be enclosed by a non-woven fabric cover made from polyethylene fibers or polypropylene fibers to filter different types of airflows.
It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed.
The accompanying drawings are included, to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings,
Reference will now be made in detail to the present preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
Referring
In this embodiment, the air filter medium 130 has a concentration of greater than 12 percent sodium permanganate by weight. Therefore, the first hollow region 105b could have a thickness d ranging from about 10 mm to about 25 mm to enable the first hollow region 105b to have a smaller pressure loss than a conventional hollow region with a thickness of more than 30 mm. In this embodiment, the thickness d of the first hollow region 105b can be 12 mm or 22 mm. According to the experiment results, the air filter medium 130 with about 12 percent sodium permanganate filled within the first hollow region 105b of a thickness 12 mm perform the same air cleaning effectiveness as the conventional air filter medium with about 6 percent potassium permanganate filled within the first hollow region 105b of a thickness 30 mm.
According to the above-discussed embodiments, the circular cylinder air filter disclosed herein has the filter medium hole designed on the bonding base. When the bonding base is fastened to the back plane, the filter medium hole is blocked by the back plane such that the plastic cover sealing the filter medium hole would not be pushed out due to the high pressure. In addition, a distance between the inner and outer cylindrical frame, i.e., a thickness of the first hollow region, is reduced to effectively reduce the pressure loss. The circular cylinder air filter can also be enclosed by a non-woven fabric cover made from polyethylene fibers or polypropylene fibers to filter different types of airflows.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.
Claims
1. A circular cylinder air filter comprising:
- a hollow inner cylindrical frame having a plurality of first filter holes, each first filter hole having a first filter web disposed within;
- a hollow outer cylindrical frame being coaxially disposed around the inner cylindrical frame and having a plurality of second filter holes, each second filter hole having a second filter web disposed within;
- a circular disc fastened to a first end of the inner cylindrical frame and the outer cylindrical frame;
- a bonding base fastened to an opposite second end of the inner cylindrical frame and the outer cylindrical frame, the bonding base having a first opening and a second opening, the first opening communicates with a first hollow region between the inner cylindrical frame and the outer cylindrical frame, the second opening communicates with a second hollow region within the inner cylindrical frame, wherein the first hollow region has a thickness ranging from about 10 mm to about 25 mm, wherein the bonding base is a disc-shaped member, which has three positioning pins disposed at a rim thereof, the three positioning pins are symmetrical as to a center of the bonding base;
- a back plane having an air inlet, when the bonding base is secured to the back plane, the second opening is aligned with the air inlet and the first opening is blocked by the back plane;
- a plurality of air filter media being filled into the first hollow region through the first opening, the air filter media having a dimension that is greater than any filter hole of the first filter webs and the second filter webs, wherein the air filter media has a concentration of greater than 12 percent sodium permanganate by weight,
- airflows to be filtered being introduced into the second hollow region through the air inlet of the back plane and the second opening, filtered via the air filter media within the first hollow region.
2. The circular cylinder air filter of claim 1, wherein the first hollow region has a thickness of 22 mm.
3. The circular cylinder air filter of claim 1, wherein the first hollow region has a thickness of 12 mm.
4. The circular cylinder air filter of claim 1, wherein any adjacent two of the three positioning pins and the center of the bonding base forms two virtual lines, which has an included angle of 120 degrees therebetween.
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Type: Grant
Filed: Dec 3, 2012
Date of Patent: Oct 21, 2014
Patent Publication Number: 20140150387
Assignee: Ye Siang Enterprise Co., Ltd. (New Taipei)
Inventor: Shih-Chieh Chuang (New Taipei City)
Primary Examiner: Robert A Hopkins
Assistant Examiner: Stephen Hobson
Application Number: 13/691,849
International Classification: B01D 46/00 (20060101);